五年级下册青岛期中真题

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1)78.6-12.38+7.62=65.22+7.62=72.84

(2)5.69-3.45-1.55 =2.24-1.55=0.69

(3)49.36-(9.36+10.51)=49.36-9.36-10.51=40-10.51=29.49

(4)7.6-(4.99-4.7)+0.78=7.6-0.29+0.78=8.09

(5)13.4+0.5-13.4+0.5 = 13.4-13.4+0.5 = 1需要hi me。