(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
(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