问一道数学题,急~~~(要简算)48x0.69+3.1x4.8

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问一道数学题,急~~~(要简算)48x0.69+3.1x4.8

问一道数学题,急~~~(要简算)48x0.69+3.1x4.8
问一道数学题,急~~~(要简算)
48x0.69+3.1x4.8

问一道数学题,急~~~(要简算)48x0.69+3.1x4.8
48x0.69+3.1x4.8
=48*0.69+0.31*48
=48*(0.69+0.31)
=48*1
=48

48x0.69+3.1x4.8 = 48 * 0.69 + 0.31 * 48

= 48 * (0.69+0.31)
= 48 * 1 = 48

48x0.69+3.1x4.8 =4.8×6.9+3.1×4.8
=4.8×(6.9+3.1)
=4.8×10
=48