计算题练习一
一、简便计算。
0.8+0.88+0.22132-43.7-56.3 23.4-0.8-13.4-7.212.78-(4.97+2.78)
25.48-(9.4-0.52) 4.9+0.8-4.9+0.8 12.96-(2.96-1.52)7.85+2.34-0.85+4.66
0.25×16.2×4(1.25+0.25)×4 4.6×0.35+4.6×0.65 4.8×7.8+78×0.52
3.14×1.9+31.4×0.8163×10.1-63×0.1 15.6×13.1-15.6-15.6×2.1
4.2×99+4.256.5×9.9+5.652.95×101-2.95 3.6×102
3.2×10172×125 99×4.33.2×2.5×1.25 2.5×0.32×12.5
63.4÷2.5÷0.4320÷1.25÷8 4.9÷1435÷(0.35×2)
二、解方程
?
÷7=1.42.5?-6=18.5 (?+4)÷0.2=45
3.1×4+2?=28.4 3?+1.5×1.2=16.8 5?-0.4×16=29.6
9(?-0.5)=452(
?-0.24?=15.27
156-3?=46.5 4
120÷3?=20 7.5?+2.1)=9.8 ?-2.4?=1.84 1.2×2.5-4?=2 12÷1.5?=5 4.215+?)÷4×2=60 ?+9?=6.12 ×0.4-0.2?=0.8 ×20÷4?=24 (
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