1.78x9.9 +17.8简算怎么答

如题所述

第1个回答  2016-04-25
1.78x9.9 +17.8简算怎么答


1.78x9.9 +17.8
=17.8×0.99+17.8
=17.8×(0.99+1)
=17.8×(2-0.01)
=35.6-0.178
=35.422本回答被网友采纳

1.78x9.9 +17.8简算怎么答
1.78x9.9 +17.8 =17.8×0.99+17.8 =17.8×(0.99+1)=17.8×(2-0.01)=35.6-0.178 =35.422

200分!!!{小学数学题(出题)}
0.9+0.1= 1-0.8= 51÷3= 360÷4= 36+44= 3800-900= 4×12= 80-19= 7×13= 4.5-4= 5.6+4= 5.7+3.3= 10-4.4= 6+6.6= 9.5-2.7= 1-0.55= 3.7+4.8= 7+3.3= 0.9+1= 45÷3= 2....

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