A-A+
能简算的要简算.①23×38+57÷83②1.36×2.7+13.6×0.73③0.25×1
问题详情
能简算的要简算. ①23×38+57÷83,
①23×3 8+57÷ 8 3
②1.36×2.7+13.6×0.73
③0.25×1.25÷1 32
④(3 8+ 7 8- 2 3)×24
⑤[1-7 8÷( 5 6+ 1 2× 1 3)]÷ 7 12
⑥2008×1 2007.
参考答案
=(23+57)×38,
=80×38,
=30;
②1.36×2.7+13.6×0.73,
=1.36×2.7+1.36×7.3
=1.36×(2.7+7.3),
=1.36×10,
=13.6;
③0.25×1.25÷132,
=0.25×1.25×32,
=(0.25×4)×(1.25×8),
=1×10,
=10;
④(38+78-23)×24,
=38×24+78×24-23×24,
=9+21-16,
=14;
⑤[1-78÷(56+12×13)]÷712,
=[1-78÷1]÷712,
=18÷712,
=314;
⑥2008×12007,
=(2007+1)×12007,
=2007×12007+12007,
=1+12007,
=112007.考点: