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两道简单的数学简算题0.8888*0.6+0.2222*7.656*1.02-1.4*0.8

题目详情
两道简单的数学简算题
0.8888*0.6+0.2222*7.6
56*1.02-1.4*0.8
▼优质解答
答案和解析
0.8888*0.6+0.2222*7.6
=0.2222*0.6*4+0.2222*7.6
=0.2222*2.4+0.2222*7.6
=0.2222*(2.4+7.6)
=0.2222*10
=2.222
56*1.02-1.4*0.8
=56*(1+0.02)-1.4*0.8
=56*1+56*0.02-1.4*0.8
=56+5.6*0.2-1.4*0.8
=56+0.8*7*0.2-1.4*0.8
=56+0.8*1.4-1.4*0.8
=56