问题
解答题
脱式计算(能简算的要简算)
17.64÷4.9+6.73
3.4÷[(1.2+0.5)×5]
9.9+19.9+999.9+0.3
0.25×12.5×32.
答案
①17.64÷4.9+6.73
=3.6+6.73
=10.33
②3.4÷[(1.2+0.5)×5]
=3.4÷(6+2.5)
=3.4÷8.5
=0.4
③9.9+19.9+999.9+0.3
=(9.9+0.1)+(19.9+0.1)+(999.9+0.1)
=10+20+1000
=1030
④0.25×12.5×32
=(0.25×4)×(12.5×8)
=1×100
=100