1.口算题目
1.口算。
答案自左至右依次是4,3.9,5.4,0.09,5.2,5.05,5/6,20,2/9,79/7,0.5,1/3,0.4,8/15,9/4。
3.44+0.56=4 6.8-2.9=3.9 0.6×9=5.4
2.7÷30=0.09 7.34-2.14=5.2 1.01×5=5.05
0.5+1/3=1/6 5/12×48=20 4/15×5/6=2/9
11+2/7=11又2/7 5×1/10=1/2 0.5-1/6=1/3
1/2×0.8=0.4 1/3+0.2=8/15 3-3/4=2又1/4
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