计算(能简算的要简算)7.24×0.1+0.5×72.4+0.049×72413×5+15×7+17×9+19×112012÷201220122013(3+34÷34+3)-(7×16÷7×16)-数学
题文
计算(能简算的要简算) 7.24×0.1+0.5×72.4+0.049×724
2012÷2012
(3+
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答案
(1)7.24×0.1+0.5×72.4+0.049×724, =7.24×0.1+5×7.24+4.9×7.24, =7.24×(0.1+5+4.9), =7.24×10, =72.4; (2)
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