计算(能简算的要简算) 7.24×0.1+0.5×72.4+0.049×724 &nb...
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...
计算(能简算的要简算) 7.24×0.1+0.5×72.4+0.049×724 13×5+15×7+17×9+19×112012÷201220122013(3+34÷34+3)-(7×16÷7×16)
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(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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=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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