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+3.1x4.848x0.69
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