题目内容

计算下面各题,能简算的要简算。
(1)(75+360)÷(35-20) (2)7.63-3.28-1.72
(3)43×102 (4)86.38-(6.38-7.56)

(5)1998+199.8+19.98+1.998+2.222

(1)原式=(75+360)÷15
                =5+24
                =29
(2)原式=7.63-(3.28+1.72)
                =7.63-5
                =2.63
(3)原式= 43×100+43×2
                = 4300+86
                = 4386
(4)原式=86.38-6.38+7.56
                =80+7.56
                =87.56

(5)原式=1998+2+(199.8+0.2)+(19.98+0.02)+(1.998+0.002)
                =2222

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