题目内容
【题目】用简便方法计算
(1)4.25-0.83+0.75-0.17
(2)2.84+7.3+7.16+2.7
【答案】(1)4
(2)20
【解析】
(1)4.25-0.83+0.75-0.17
=(4.25+0.75)-(0.83+0.17)
=5-1
=4
(2)2.84+7.3+7.16+2.7
=(2.84+7.16)+(7.3+2.7)
=10+10
=20
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题目内容
【题目】用简便方法计算
(1)4.25-0.83+0.75-0.17
(2)2.84+7.3+7.16+2.7
【答案】(1)4
(2)20
【解析】
(1)4.25-0.83+0.75-0.17
=(4.25+0.75)-(0.83+0.17)
=5-1
=4
(2)2.84+7.3+7.16+2.7
=(2.84+7.16)+(7.3+2.7)
=10+10
=20