38×49+49×61+49,108×29+108×70+108,1800—(820+650÷13)的简便运算

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/28 12:27:51
38×49+49×61+49,108×29+108×70+108,1800—(820+650÷13)的简便运算38×49+49×61+49,108×29+108×70+108,1800—(820+65

38×49+49×61+49,108×29+108×70+108,1800—(820+650÷13)的简便运算
38×49+49×61+49,108×29+108×70+108,1800—(820+650÷13)的简便运算

38×49+49×61+49,108×29+108×70+108,1800—(820+650÷13)的简便运算
38×49+49×61+49
=49×(38+61+1)
=49×100
=4900
108×29+108×70+108
=108×(29+70+1)
=108×100
=10800
1800—(820+650÷13)
=1800-(820+50)
=1800-(800+70)
=1800-800-70
=1000-70
=930
明教为您解答,
请点击[满意答案];如若您有不满意之处,请指出,我一定改正!
希望还您一个正确答复!
祝您学业进步!