现在！立刻！马上！真的很急！谢谢
第1个回答 2020-03-31
第2个回答 2020-03-31
630÷45
=630÷(5×9)
=630÷5÷9
=126÷9
=14
36×56＋72×22
=36×56+36×2×22
=36×(56+2×22)
=36×100
=3600
99×98＋198
=99×98＋99×2
=99×（98+2）
=99×100
=9900
62×36－62+62×35
=62×(36-1+35)
=62×70
=4340本回答被网友采纳
=630÷(5×9)
=630÷5÷9
=126÷9
=14
36×56＋72×22
=36×56+36×2×22
=36×(56+2×22)
=36×100
=3600
99×98＋198
=99×98＋99×2
=99×（98+2）
=99×100
=9900
62×36－62+62×35
=62×(36-1+35)
=62×70
=4340本回答被网友采纳
