数学计算课程教案_数学计算教案
数学计算课程教案由刀豆文库小编整理,希望给你工作、学习、生活带来方便,猜你可能喜欢“数学计算教案”。
第一讲:简便计算技巧
一、知识概要
1、熟悉运算规律交换律(+、—)、结合律(+、—)、同级选择律。
2、掌握分配律的运用和逆用。()在除号后面没有分配律
3、掌握好2x5=10、25x4=100、125x8=1000,包括小数和分数
4、!!!!!!!!学会观察算式结构、多退少补、灵活处理!!!!!!!!!!!!!
二、活学活用
175-75÷25
68+35×13
725-(125+237)
(114+166)÷35
432÷(9×8)
189-60+40
216+305/5
47+236+64
5+25×44
102×99
8+2×125
645-180-245
382×101-382
4×60×50×8
35×8+35×6-4×35
0.175÷0.25×4
0.175÷0.25÷0.4
200÷[(172-72÷25]
630×[840÷(240-212)]
800÷25
2000÷125
25×63×4
9000÷125
99×11
794-198
68×25
428×(3080-1980)-7426756-193-207
72×125
97×360+3×360
124×25-25×24
2800÷ 100+789
75÷〔138÷(100-54)〕
85×(95-1440÷24)
240×78÷(154-115)
80400-(4300+870÷15)
1437×27+27×563
[75-(12+18)]÷15
(6.8-6.8×0.55)÷8.5
7.2÷0.8-1.2×5
864÷[(27-23)×12
(45+38-16)×24
500-(240+38×6)
[64-(87-42)] ×15
(845-15×3)÷1612×[(49-28)÷7]
450÷[(84-48])÷12
(58+37)÷(64-9×5)
0.12× 4.8÷0.12×4.8
95÷(64-45)
6.5×(4.8-1.2×4)
(284+16)×(512-8208÷18)
178-145÷5×6+42
812-700÷(9+31×11)
120-36×4÷18+35
32.52-(6+9.728÷3.2)×2.5
(3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
(6.8-6.8×0.55)÷3.66+7.85-5.37
[(7.1-5.6)×0.9-1.15] ÷2.5
85+14×(14+208÷26)
(58+37)÷(64-9×5)
2800÷ 100+789(947-599)+76×64 36×(913-276÷23)
(93+25×21)×9 507÷13×63+498(39-21)×(396÷6)
723-(521+504)÷25 384÷12+23×371 848-640÷16×12
57×12-560÷35 [ 192-(54+38)]×67 138×25×4 1500-32×45(13×125)×(3×8)(12+24+80)×50
704×25-509 25×32×125 32×(25+125)
178×101-178 84×36+64×84 98×199 75×99+2×75 83×102-83×2 25×(24+16)178×99+178 79
123×18-123×3+85×123
7300÷25÷4 810075×27+19×2 5 31×870+13×310 138×25×4(13×125)×(3×8)
(12+24+80)×50 25×32×125
102×76 58×98 75×99+2×75
84×36+64×84 98×199 85
50×(34×4)×3 25×(24+16)
79×42+79+79×57 7300÷25÷4
50×(34×4)×3 ×42+79+79×57 ÷4÷75 ×(25×65+25×28)
32×(25+125)178×101-178 83×102-83×2 ×(95-1440÷24)178×99+178
三、方程式计算(70题)2x+8=16
x÷5=10
x+7x=8
9x-3x=6
6x-8=4
5x+x=9
x+7x=8
x÷5=10
x-8=6x
9x-3x=6
4÷5x=20
7x+7=14
2x-8=10
3x+7=28
x56116
4÷5x=20 6x-8=4
2x-6=12
6x-6=0
3x-7=26
126x3
2x-6=12
5x+x=9
x-5÷6=7
5x+6=11
9x-x=16
2x+8=16
x-8=6x
1÷2x-8=4
24x+x=50 x25310
513161x
x
x1
637377
311143x
x1
x
x57117
x2719
38x19
x27313
4535x12
x12119
x53316
x59113
94x38512
53x35
x23711
35x112
x5112172
x
x
59x16
x235320
x59116
x215310
1512x13
7967x14
x512116
x56119
312x118
x7121118
510x58114
5317x314
112x23
512x124
x23918
12155131xx
x5
1326261218
下面各题怎样算简便就怎样算。
6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.89)
4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48)
3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2
3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47
5.27+2.86-0.66+1.63 13.35-4.68+2.65 73.8-1.64-13.8-5.36
47.8-7.45+8.8 0.398+0.36+3.64 15.75+3.59-0.59+14.25
66.86-8.66-1.34 0.25×16.2×4(1.25-0.125)×8
3.6×102 3.72×3.5+6.28×3.5 36.8-3.9-6.1
15.6×13.1-15.6-15.6×2.1 4.8×7.8+78×0.52 32+4.9-0.9
4.8×100.1 56.5×9.9+56.5 7.09×10.8-0.8×7.09
25.48-(9.4-0.52)4.2
18.76×9.9+18.76 3.52
5.6÷3.5 9.6
17.8÷(1.78×4)0.49
15.2÷0.25÷4 0.89
3.83×4.56+3.83×5.44 4.36
27.5×3.7-7.5×3.7 8.54÷0.2 ÷0.5 320÷2.5÷0.4 3.9÷0.8÷0.4 4.2÷0.049÷10 1.25×100.1 146.5×12.5×8 9.7÷2.5÷0.4 3.2÷1.25÷8 -4.1+6.1-5.9 ×99+4.2 ×2.5×32 -(23+46.5)×99+9.7 ×0.25×12.5
(45.9-32.7)÷8÷0.125 3.14×0.68+31.4×0.032 5.6÷1.25÷0.8÷2.5÷0.4
7.2×0.2+2.4×1.4 33
3.9×2.7+3.9×7.3 18
21×(9.3-3.7)-5.6 15.02-6.8-1.02 5.4
2.3×16+2.3×23+2.3 9.43-
46×57+23×86 13.7
101×0.87-0.91×87 10.7
4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24
×66+33×34 7.74×(2.8-1.3)+1.5×2.26 -1.8÷0.125÷0.8 12.7×9.9+1.27 ×11-5.4(6.28-1.57)3.65×4.7-36.5×0.37 ×0.25-3.7÷4 2.22×9.9+6.66×6.7 ×16.1-15.1×10.7 0.79×199-0.79×99
2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98
0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5
3.07-0.38-1.62 1.29
3.25+1.79-0.59+1.75 23.4
3.2+0.36+4.8+1.64 1.23
12.7-(3.7+0.84)36.54
7.6×0.8+0.2×7.6
+3.7+2.71+6.3 8-0.8-13.4-7.2 125+3.4-0.23+6.6 0.25-1.76-4.54 0.25(105+88)+95 0.25+4.9-6.5 -2.45-1.55 ×64 ×16 ×0.73×4 ×8.5×4
1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35
0.8×(4.3×1.25)12
0.86×15.7-0.86×14.7 103+72+97+28 2.31
14-7.32-2.68 2.64
(2.5-0.25)×0.4 9.16
96.5 ÷2.5÷0.4 63-
63.4÷2.5÷0.4 63
32.4×0.9+0.1×32.4 15+3.12×99 28.6+8.67+7.36+11.33 70×1.5-0.5×9.16 3.6(83-32)930÷2÷5 3.9÷(0.25×0.4)0.35×101-28.6 ×1.2×0.5 ÷280 -3.6×0.5 ÷0.6÷5 ÷(1.3×5)×1.25×2×0.8