| 15÷1%= | 9.1-1.9-7.1= | 0.3×0.3÷0.3×0.3= | 0.35×99+0.35= | -( - )= |
÷ × = | - = | 0.25×32×0.125= | + - + = | ×0.25×4× = |
| 15÷1%=1500, | 9.1-1.9-7.1=0.1, | 0.3×0.3÷0.3×0.3=0.09, | 0.35×99+0.35=35, | -( - )= , |
÷ × = , | - = , | 0.25×32×0.125=1, | + - + = , | ×0.25×4× = . |
分析:9.1-1.9-7.1,
-(
-
),根据减法的性质简算;0.3×0.3÷0.3×0.3按照从左到右的顺序计算;
0.35×99+0.35运用乘法分配律简算;
0.25×32×0.125先把32分解成4×8,再运用乘法结合律简算;
+
-
+
运用加法交换律和结合律简算;
×0.25×4×
运用乘法交换律和结合律简算.点评:本题考查了简单的运算,要注意根据运算法则和运算定律快速准确的得出答案.
×
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