71+72+68+69+74
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/12 23:26:34
71+72+68+69+74
2×23×125×4
125×56
3579×101
140×299
34×103-59×34+56×34.
2×23×125×4
125×56
3579×101
140×299
34×103-59×34+56×34.
(1)71+72+68+69+74,
=(71+69)+(72+68)+74,
=140+140+74,
=280+74,
=354;
(2)2×23×125×4,
=(2×4×125)×23,
=1000×23,
=23000;
(3)125×56,
=125×(8×7),
=(125×8)×7,
=1000×7,
=7000;
(4)3579×101,
=3579×(100+1),
=3579×100+3579×1,
=357900+3579,
=361479;
(5)140×299,
=140×(300-1),
=140×300-140×1,
=42000-140,
=41860;
(6)34×103-59×34+56×34,
=34×(103-59+56),
=34×100,
=3400.
=(71+69)+(72+68)+74,
=140+140+74,
=280+74,
=354;
(2)2×23×125×4,
=(2×4×125)×23,
=1000×23,
=23000;
(3)125×56,
=125×(8×7),
=(125×8)×7,
=1000×7,
=7000;
(4)3579×101,
=3579×(100+1),
=3579×100+3579×1,
=357900+3579,
=361479;
(5)140×299,
=140×(300-1),
=140×300-140×1,
=42000-140,
=41860;
(6)34×103-59×34+56×34,
=34×(103-59+56),
=34×100,
=3400.
71+72+68+69+74
68 69 70 71 72 73 74 75
66 67 68 69 70 71 72 73 74 75
66 67 68 69 70 71 72 73 74
77+68,74,64,69,76,72,63,71,66在÷10简便算法
《繁心春水》中的“繁星”第67、68、69、70、71、72、73、74小节是什么意思?
1+2.....+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+
78+77+76-75-74-73+72+71+70-69-68-67+.+6+5+4-3-2
71+73+69+74+68+70+69=这个算式怎样简算
1+2.+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+85+8
一组观察值69,73,72,79,72,71,73,68,75,72.其众数为?
魔兵传奇第68 69 70 71 72 73集的题目