计算题 小数乘除法、方程、小数加减法
无锡海岸城-白杨礼赞教案
脱式计算(能简算的要简算)
2.5×7.1×4
16.12×99+16.12 5.2×0.9+0.9 4.3×50×0.2
64-2.64×0.5
26×15.7+15.7×24 (2.275 +0.625)×0.28
3.94+34.3×0.2
1.2×(9.6÷2.4)÷4.8 8.9×1.1×4.7
2.7×5.4×3.9 3.6×9.85-5.46
8.05×3.4+7.6
6.58×4.5×0.9 2.8×0.5+1.58 32+4.9-0.9
4.8-4.8×0.5
(1.25-0.125)×8 4.8×100.1
56.5×99+56.5 7.09×10.8-0.8×7.09
4.85 + 0.35 ÷ 1.4
8.7 × 17.4 - 8.7 × 7.4 12.5×0.4×2.5×8
0.87×3.16+4.64
9.5×101 0.68 ÷(5.2 -3.5)× 1.25 40.5 ÷
0.81 × 0.18 4.8 ×(15 ÷ 2.4)
6.81+6.81×99 0.25×185×40
4.4×0.8-3.4×0.8 (9.37+9.37+9.37+9.37)× 2.5
2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.1
2.5×(3.8×0.04) 7.69×101
3.8×10.1 0.25×39+0.25
0.125×72 46×0.33+54×0.33 (8×5.27) ×1.25
6.81+6.81×99 0.25×185×40 6.8×0.75÷0.5
3.75÷0.125–2.75 1.53+23.4÷7.2
9.5×99 13.5×0.98
12.5×8.8 7.28×99+7.28
7.05×23.7+7.05×76.3
0.125×3.2×2.5 12.81-(1.5+7.81)
8.7×2.6+6.4×8.7+8.7 1025-1125÷4.5×3.6
12.25-3.1+0.85-6.17
(1.9-1.9×0.9)÷(3.8-2.8) 2.65×1.7+1.35×1.7
解方程:
54-X=24
7X=49 126÷X=42 13+A=28.5 2.4X=26.4
7.5x-3x=18
5×1.3-2x=5.5
24x+6x=63.6 5.6x+4.4x=5.2 x+3.86=5.46
17.89-x=12.89
40.8+x=57.3
x-3.25=16 2x+0.82=8.2 3+0.5x=7
7.8÷x=2.6
80x÷4=12
5-0.9x=2.75 2x+0.4x=48 6-2x+6x=18
35x+13x=9.6
0.52×5-4x=0.6
0.7(x+0.9)=42 1.3x+2.4×3=12.4 3.5x = 140
2x +5 = 40 15x+6x =
168 5x+1.5 = 4.5 13.7—x = 5.29
(写出检验过程)
4.2 × 3—3x = 5.1
20.5-4x=8.1 3.6x÷1.2=9.75
18×1.5-1.7x=13.4
18.5x-9.9x=1.721 9.2x+1.5x=32.1
7.2×5-8x=11.2 4x+3×0.7=6.5
(口算)
0.6×1.2=
0.84÷0.6= 4.5×0.1= 7.2+2.8=
12×2.5=
15×0.4= 0.1×0.5=
2.8÷7= 2.63+0.37= 0.96÷0.3=
100÷0.01= 1.4×3= 0.72÷8=
1.5-4.5= 2.5×0.4=
6÷0.03=
0.5×0.6= 40×0.9= 0.7×16-16×0.2=
4÷0.5= 7×2.1= 8.89+0.1=
1.4×2.5×4=
24×0.25= 0.1÷0.01=
2.4×0.8= 8-2.5= 6÷1.2=
9×0.4=
10×0.01= 30.2-3.02= 9.2÷2.3=
4÷0.25=
4.3-0.25= 1-0.82=
9.6÷0.3= 24÷4+56÷4= 4.8÷0.3=
2.6×0.01= 0×25.4= 4.8×0.4=
30×(200+3)=
0.36+0.64= 1.8×5=
8.4÷4.2= 8×1.5= 2.73+1.5×4=
计算下面各题(能简算的要简算)
7.05×23.7+7.05×76.3
0.125×3.2×2.5 12.81-(1.5+7.81)
8.7×2.6+6.4×8.7+8.7
1025-1125÷4.5×3.6 12.25-3.1+0.85-6.17
(1.9-1.9×0.9)÷(3.8-2.8)
2.65×1.7+1.35×1.7
列竖式计算,得数保留一位小数。
1.2×1.4=
0.37×8.4= 3.14×2.8=
0.85×1.12= 0.86×5.4=
0.15×2.34=
40÷14=
26.37÷31= 45.5÷38=
1560÷35= 4.8÷2.3=
1.55÷3.9=
7.2÷2.1=
3.87÷7= 146.4÷13=
5.63÷6.1= 2.84×0.03=
0.38×0.13=
26.37÷31=
4.8÷23=
列竖式计算
1.64+2.35=
8.65
0.58×250=
12.5
10-7.64=
926×0.15=
23×7.06=
100.2
32÷42=
0.382×0.13=
-6.31=
+3.6=
1.86×7=
13.88
8÷500= 26.3
-2.28=
2.84×0.03=
4.2÷4.5=
28.448÷14=
10.88÷34=
-6.29=
+7.93=
44÷9=
(精确到百分位)
三、计算(能简便的用简便方法计算)
8×25×1.25×16 4.04×250
45.55-(6.82+15.55)
3.2×99+3.2 4.8×39+61×4.8
34.52-17.87-12.23
2.5×56+4.5×65 489×101-489
4.57+3.17+3.43+5.83
4.6×56+48×4.6-4.6×4
竖式计算:
18÷24=
43.68÷26= 25.3÷0.88=
0.1575÷3.15= 0.612÷1.8=
16.787÷0.28(保留一位小数 )
1、 算下面各题
2.36×0.22 2.8×4.58
3.57÷4.2 82.8÷36
45×2.46 3.6÷0.24
382.5÷45 6.4×5.48
2、 简便计算
3.6×2.5+7.5×3.6 2.5×1.2
0.125×32
4.3×0.9
18÷24=
0.1575÷3.15=
6.5×102
43.68÷26=
0.612÷1.8=
3.25×99+3.25
25.3÷0.88=
16.787÷0.28