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递等式计算,能巧算的要巧算.630÷6+598842-462-23857+43×8708+247+1928×78-8×7067×4÷2.
题目详情
递等式计算,能巧算的要巧算.
630÷6+598
842-462-238
57+43×8
708+247+192
8×78-8×70
67×4÷2.
630÷6+598
842-462-238
57+43×8
708+247+192
8×78-8×70
67×4÷2.
▼优质解答
答案和解析
(1)630÷6+598,
=105+598,
=703;
(2)842-462-238,
=842-(462+238),
=842-700,
=142;
(3)57+43×8,
=57+344,
=401;
(4)708+247+192,
=708+192+247,
=900+247,
=1147;
(5)8×78-8×70,
=(78-70)×8,
=8×8,
=64;
(6)67×4÷2,
=67×(4÷2),
=67×2,
=134.
=105+598,
=703;
(2)842-462-238,
=842-(462+238),
=842-700,
=142;
(3)57+43×8,
=57+344,
=401;
(4)708+247+192,
=708+192+247,
=900+247,
=1147;
(5)8×78-8×70,
=(78-70)×8,
=8×8,
=64;
(6)67×4÷2,
=67×(4÷2),
=67×2,
=134.
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