题目
计算,能简便的要简便计算.
(1)
2.08×75﹣83.07
(2)
1.49×101﹣1.49
(3)
8.4×10.1
(4)
3.47×6.84+3.47×3.16
(5)
77.56÷1.25÷0.8
答案: 2.08×75﹣83.07 =156﹣83.07 =72.93
1.49×101﹣1.49 =1.49×(101﹣1) =1.49×100 =149
8.4×10.1 =8.4×(10+0.1) =8.4×10+8.4×0.1 =84+0.84 =84.84
3.47×6.84+3.47×3.16 =3.47×(6.84+3.16) =3.47×10 =34.7
77.56÷1.25÷0.8 =77.56÷(1.25×0.8) =77.56÷1 =77.56