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四年级简便计算题100道带答案

(300+6)x12 =300×12+6×12 =3600+72 =3672 25x(4+8) =25×4+25×8 =100+200 =300 84x101 =84×100+84×1 =8400+84 =8484 504x25 =500×25+4×25 =12500+100 =12600

127+86 1195+2768 4598+1181 7652+5842 269+589 3658+1240 98+265+202 273-73-27 250×13×4 88×125 136×101-136 4600÷25÷4 498×109+2×109 95×102 9600―453―547 252×12+348×12

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 360÷24 =360÷6÷4 =60÷4 =15 240÷48 =240÷24÷2 =10÷2 =5 27+456+73 =(27+73)+456 =100+456 =556 24÷4+56÷4 =(24...

158+262+138 375+219+381+225 5001-247-1021-232 (181+2564)+2719 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99999 7755-(2187+755) 2214+638+286 3065-738-1065 899+344 2357-183-317-357 236...

1、56+31+24=(56+24)+31=80+31=111, 2、615+475+125 =615+(475+125)=615+600=1215 3、125×64 =125×8×8=1000×8=8000 4、 89+101+111=101+(89+111)=101+200=301 5、24+127+476+573 =(24+476)+(127+573)=500+700=1200 6、400-273...

交换律; 结合律; 乘法分配律; 提取公因式; 拆分法。 1.交换律:256+78-56=256-56+78=200+78=278 450×9÷50=450÷50×9=9×9=81 2.结合律:73+58+27+42=(73+27)+(58+42)=100+100=200345-67-33=345-(67+33)=345-100=245 789-133+33=789-(13...

1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 × 49/9 - 4/3 5. 8/9 × 15/36 + 1/27 6. 12× 5/6 – 2/9 ×3 7. 8× 5/4 + 1/4 8. 6÷ 3/8 – 3/8 ÷6 9. 4/7 × 5/9 + 3/7 × 5/9 10. 5/2 -( 3/2 + 4/5 ) 11. 7/8 + (...

(1)2.64×1.7-2.64×0.7 =2.64×(1.7-0.7) =2.64×1 =2.64 (2)31.5×1.07-3.15×0.7 =3.15×10.7-3.15×0.7 =3.15×(10.7-0.7) =3.15×10 =31.5 (3)2.7×5.7-2.7+5.3×2.7 =2.7×(5.7-1+5.3) =2.7×10 =27 (4)0.625÷0.125×0.8 =(0.625×0.8)×8÷...

47+398 =47+400-2 =447-2 =445

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