直接写得数．
3.6×0.1= 2.5×4= 7.2÷1.2= 3.9÷3.9= 1﹣0.2×4=
0.25×4×3= 1.6+1.6×4= 2.5÷（2×5）= 0.98﹣0.8= 2.1+0.5=
直接写得数．
3.6×0.1= 2.5×4= 7.2÷1.2= 3.9÷3.9= 1﹣0.2×4=
0.25×4×3= 1.6+1.6×4= 2.5÷（2×5）= 0.98﹣0.8= 2.1+0.5=
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，还剩下几分之几没有看？剩下的比已经看的多几分之几？
与一个数合起来是
，这个数是多少？
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