(610)整数简便运算专项练习600题(有答案)ok

=100+300, =400;

(591)156×83+156×17, =156×(83+17), =156×100, =15600;

(592)25×73×4, =25×4×73, =100×73, =7300.

(593)745-179-21, =745-(179+21), =745-200, =545;

(594)125×66×8, =(125×8)×66, =1000×66, =66000;

(595)7200÷45÷2, =7200÷(45×2), =7200÷90, =80;

(596)1600-704-275-225-296,=1600-(704+296)-(275+225),=1600-1000-500, =600-500, =100;

(597)27+979+1973+9021, =(27+1973)+(979+9021), =2000+10000, =12000;

(598)3291+599-898, =3291+600-1-900+2, =3291+600-900-1+2, =3891-900-1+2, =2991-1+2, =2990+2, =2992;

(599)833-243-457, =833-(243+457), =833-700, =133;

(600)199×47+47, =(199+1)×47, =200×47, =9400.

整数简便运算--- 37

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