| 134-18= | 1.01-0.98= | × = | 1.5×4= |
| 7.45+8.55= | + ×8= | 2÷0.25+1.1= | ×6÷ ×6= |
| 5.76-(2.76+0.8)= | 108× -10= | 0.125×17×8= | 0.43= |
解:
| 134-18=116, | 1.01-0.98=0.03, | × = , | 1.5×4=6, |
| 7.45+8.55=16, | + ×8=6 , | 2÷0.25+1.1=9.1, | ×6÷ ×6=36, |
| 5.76-(2.76+0.8)=2.2, | 108× -10=2, | 0.125×17×8=17, | 0.43=0.064. |
分析:134-18,1.01-0.98,运用凑整法简算;
+
×8先算乘法,再算加法;2÷0.25+1.1先算除法,再算加法;
×6÷
×6先把除法变成乘法,再运用乘法分配律简算;5.76-(2.76+0.8)根据减去两个数的和,等于连续减去这两个数简算;108×
-10先算乘法,再算减法;0.125×17×8运用乘法交换律简算;0.43=0.4×0.4×0.4,由此求解.点评:本题考查了基本的运算,要注意分析数据,选择合适的简算方法简算.
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