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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