题目内容
【题目】
直接写得数.
345+233= 45×11= 527﹣398= 235﹣47﹣53=
0.78+1.32= = 2.56+1.4= 1.9×4×0.5=
3.67÷100= 3.25×1000= 0.125×0.8= 3.6+2.8+6.4=
6.08×304≈ 4838÷61≈ 15﹣2.55= =
= = = =
【答案】578,495,129,135,2.1,,3.96,3.8,0.0367,325,0.1,12.8,1800,80,12.45,,,,,9.
【解析】
试题分析:235﹣47﹣53根据减法的性质简算;1.9×4×0.5运用乘法结合律简;3.6+2.8+6.4运用加法交换律简算;先把除法变成乘法,再运用乘法交换律简算;运用乘法分配律简算;其它题目根据运算法则进行求解.
解:345+233=578, 45×11=495, 527﹣398=129, 235﹣47﹣53=135,
0.78+1.32=2.1, =, 2.56+1.4=3.96, 1.9×4×0.5=3.8,
3.67÷100=0.0367, 3.25×1000=325, 0.125×0.8=0.1, 3.6+2.8+6.4=12.8,
6.08×304≈1800, 4838÷61≈80, 15﹣2.55=12.45, =,
=, =, =, =9.
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