3.42乘76.3加57.6乘7.63加91.8乘2.3.7怎么算,要简便运算,急!谢谢大家啦!

=260.946+439.488+217.566=918

3.42*76.3+57.6*7.63+91.8*2.37
=7.63*(34.2+57.6)+91.8*2.37
=7.63*91.8+91.8*2.37
=(7.63+2.37)*91.8
=918

3.42×76.3 + 57.6×7.63 + 91.8×2.37
= 34.2×7.63 + 57.6×7.63 + 91.8×2.37
= (34.2 + 57.6)×7.63 + 91.8×2.37
= 91.8×7.63 + 91.8×2.37
= 91.8×(7.63 + 2.37)
= 91.8×10
= 918

2.3.7是什么啊？

3.42乘76.3加57.6乘7.63加91.8乘2.3.7
=7.63x(34.2+57.6)+91.8x2.37
=7.63x91.8+91.8x2.37
=(7.63+2.37)x91.8
=10x91.8
=918

3.42*76.3+57.6*7.63+91.8*2.37
=34.2*7.63+57.6*7.63+91.8*2.37
=（34.2+57.6）*7.63+91.8*2.37
=91.8*7.63+91.8*2.37
=91.8*（7.63+2.37）
=91.8*10
=918