脱式计算.(能简便的用简便方法计算)12.53-1.35×2-9.3 0.8÷(4-3.75)÷0.1 4 5 + 11 15 + 3 10 7-( 3 4 - 2 5 ) 11 12 + 5 8 + 3 8 + 1 12 10- 6 7 - 1 7 .
(1)12.53-1.35×2-9.3, =12.53-2.7-9.3, =12.53-(2.7+9.3), =12.53-12, =0.53; (2)0.8÷(4-3.75)÷0.1, =0.8÷0.25÷0.1, =3.2÷0.1, =32; (3)
=
=
(4)7-(
=7-
=6
(5)
=(
=1+1, =2; (6)10-
=10-(
=10-1, =9. |
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