问题
解答题
简便计算.
(1)37.9×94+37.9×7-37.9.
(2)8888×1111+4444×7778.
答案
(1)37.9×94+37.9×7-37.9,
=37.9×94+37.9×7-37.9×1,
=37.9×(94+7-1),
=37.9×100,
=3790;
(2)8888×1111+4444×7778,
=4444×2×1111+4444×7778,
=4444×(1111×2+7778),
=4444×10000,
=44440000.