4年级下册数学简便运算200题

蔚征陈4470小学四年级数学用简便方法计算: -
滑孔锦13986524809 ______ 216+64*42/28 =216+16*4*6*7÷(4*7) =216+16*6 =216+96 =312 15*27-3000/25 =15*27-15*2*100÷25 =15*(27-8) =15*(20-1) =15*20-15 =300-15 =285 402-357+98 =402+98-357 =143 576-287+124 =576+124-287 =413

蔚征陈4470小学四年级下册简便计算我做作业用!而且很急用!要快!急用,很急的! -
滑孔锦13986524809 ______[答案] 8*(125-25) 48+52÷4 160+40÷4 (19-11)*125 (12+42÷7)*5 26*8÷26*8 498+397 502-399 63-45-55+137 125*56 302*99+302 145*89+145*21 14*500 280÷280 2400÷80 33*20 198+36 250*400 96÷6 900÷1 80÷16 432-198 125*24 24*5 14.15+5.87+5....

蔚征陈4470四年级下册简便计算 -
滑孔锦13986524809 ______ ①28X11111+9999X8 =28X11111+1111X9X8 =(28+9X8)X1111 =100X1111 =111100 ②73X33+66X9 =73X33+33X2X9 =(73+18)X33 =91X33 =90X33+1X33 =2970+33 =3003

蔚征陈4470四年级数学下册简便计算方法46*99简便计算方法 -
滑孔锦13986524809 ______[答案] 可用等量代换,把99变成100减去1,就好办了, 46x99 =46x(100-1) =46x100-46x1 =4600-46 =4554

蔚征陈4470求小学四年级下册简便运算题153道,有多少写多少, -
滑孔锦13986524809 ______[答案] 四年级两位数乘一位数 (1) 94 * 8 = (2) 57 * 6 = (3) 9 * 67 = (4) 26 * 9 = (5) 41 * 9 = (6) 57 * 3 = (7) 7 * 79 = (8) 62 * 5 = (9) 21 * 1 = (10) 3 * 57 = (11) 5 * 84 = (12) 8 * 26 = (13) 5 * 67 = (14) 37 * 4 = (15) 8 * 98 = (16) 6 * 24 = (17) 98 * 5 = (18) 12 * ...

蔚征陈44701000道四年级数学简便计算 -
滑孔锦13986524809 ______ 希望能帮到你 300÷125÷8=300÷(125*8)=300÷1000=0.3 396-96-172-28 =(396-96)-(172+28)= 300-200 = 100 125*24 = 125*8*3 = 1000*3 = 3000 26*15 = (20+6)*15 = 20*15 + 6*15 = 300+90 =390 25*99*4 = 25*4*99 = 100*99 = 9900 250*32 = 250...

蔚征陈4470人教版四年级下数学105页第2题105页2、用简便方法计算.0.384+0.36+2.645.26+3.43+0.741.29+3.7+0.71+6.33.9+4.08+3.92+1.1 -
滑孔锦13986524809 ______[答案] 1、0.36+2.64=3 3+0.384=3.384 2、5.26+0.74=6 6+3.43=9.43 3、3.7+6.3=10 1.29+0.71=2 10+2=12 4、3.9+1.1=5 4.08+3.92=8 5+8=13 原来四年级的孩纸们已经要算小数点后三位了么……= =同情+膜拜ing

蔚征陈4470四年级下册数学简便运算9000000÷125÷25÷8÷5÷4÷2 -
滑孔锦13986524809 ______[答案] 9000000÷125÷25÷8÷5÷4÷2 =9000000÷(125*8)÷(25*4)÷(5*2) =9000000÷1000÷100÷10 =9 祝开心

蔚征陈4470小学四年级下册数学简便计算题 -
滑孔锦13986524809 ______ 1. 3/7 * 49/9 - 4/3 2. 8/9 * 15/36 + 1/27 3. 12* 5/6 – 2/9 *3 4. 8* 5/4 + 1/4 5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 * 5...

蔚征陈4470四年级下册数学简便计算183*3 - 3 - 3*82怎么做? -
滑孔锦13986524809 ______[答案] 183*3-3-3*82 =3*(183-1-82) =3*100 =300