四年级数学下册脱式计算及答案
49×102-2×49 125×76×8
833-243-457 99×32
67+263+43 41000÷(41×5)
301-438÷73 4000÷25-13×12
49×102-2×49 125×76×8
=49×(102-2) =125×8×76
=4900 =76000
833-243-457 99×32
=833-(243+457) =100×32-1×32
=133 =3168
67+263+43 41000÷(41×5)
=67+43+263 =41000÷41÷5
=373 =200
301-438÷73 4000÷25-13×12
=301-6 =160-156
=295 =4
(1)672÷[(26﹣24)×8]
(2)75÷[(520+20)÷36]
(3)90+(5500÷55÷10)
(1)672÷[(26﹣24)×8]
=672÷[2×8]
=672÷16
=42;
(2)75÷[(520+20)÷36]
=75÷[540÷36]
=75÷15
=5;
(3)90+(5500÷55÷10)
=90+(100÷10)
=90+10
=100.
168﹣32﹣68 325×99+325 28×25
125×32×25 38000÷125÷8 101×79.
(1)168﹣32﹣68
=168﹣(32+68)
=168﹣100
=68
(2)325×99+325
=325×(99+1)
=325×100
=32500
(3)28×25
=(7×4)×25
=7×(4×25)
=7×100
=700
(4)125×32×25
=125×(8×4)×25
=(125×8)×(4×25)
=1000×100
=100000
(5)38000÷125÷8
=38000÷(125×8)
=38000÷1000
=38
(6)101×79
=(100+1)×79
=100×79+1×79
=7900+79
=7979
1、125+25×6 2、120-60÷5×5
3、1024÷16×3 4、(135+415)÷5+16
5、164-13×5+85 6、330÷(65-50)
7、128-6×8÷16 8、64×(12+65÷13)
9、5940÷45×(798-616) 10、(315×40-364)÷7
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