脱式计算.(能简便的用简便方法计算)12.53-1.35×2-9.30.8÷(4-3.75)÷0.145+1115+3107-(34-25)1112+58+38+11210-67-17.-数学
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答案
(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)
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=
(4)7-(
=7-
=6
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