计算(能简算的要写出简算过程)①7968-2968÷28×27②5.47-359+3.63-249③(8.8-23.4×13)÷59④0.3×149+659×310⑤12.5×2.5×12×83⑥[1.6-(65-415)×37]÷23.-数学
题文
计算(能简算的要写出简算过程) ①7968-2968÷28×27 ②5.47-3
③(8.8-23.4×
④0.3×1
⑤12.5×2.5×12×
⑥[1.6-(
|
答案
①7968-2968÷28×27, =7968-106×27, =7968-2862, =5106; ②5.47-3
=(5.47+3.63)-(3
=9-6, =3; ③(8.8-23.4×
=(8.8-7.8)÷
=1÷
=
④0.3×1 |