脱式计算(能简便的要简便计算) 4.5×5.2+4.5×4.8 8.8×1.25 0.4×(4.3×2.5) 60.8-1.7
脱式计算(能简便的要简便计算)4.5×5.2+4.5×4.88.8×1.250.4×(4.3×2.5)60.8-1.75-1.250.4×(4.3×2.5)45×10.1...
脱式计算(能简便的要简便计算) 4.5×5.2+4.5×4.8 8.8×1.25 0.4×(4.3×2.5) 60.8-1.75-1.25 0.4×(4.3×2.5) 45×10.1 0.63+0.42+0.37+9.58 8.36×99+8.36 0.78×99 90÷(3.6-1.8) 36÷[(6.1-4.6)×0.8] 1.6×(2.25+10.5÷1.5) 12.75÷[14.6-(1.3+8.2)] 3.2+3.91÷(19-16.7)
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(1)4.5×5.2+4.5×4.8
=4.5×(5.2+4.8)
=4.5×10
=45;
(2)8.8×1.25
=(8+0.8)×1.25
=8×1.25+0.8×1.25
=10+1
=11;
(3)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(4)60.8-1.75-1.25
=60.8-(1.75+1.25)
=60.8-3
=57.8;
(5)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(6)45×10.1
=45×(10+0.1)
=45×10+45×0.1
=450+4.5
=454.5;
(7)0.63+0.42+0.37+9.58
=(0.63+0.37)+(0.42+9.58)
=1+10
=11;
(8)8.36×99+8.36
=8.36×(99+1)
=8.36×100
=836;
(9)0.78×99
=0.78×(100-1)
=0.78×100-0.78×1
=78-0.78
=77.22;
(10)90÷(3.6-1.8)
=90÷1.8
=50;
(11)36÷[(6.1-4.6)×0.8]
=36÷[1.5×0.8]
=36÷1.2
=30;
(12)1.6×(2.25+10.5÷1.5)
=1.6×(2.25+7)
=1.6×9.25
=14.8;
(13)12.75÷[14.6-(1.3+8.2)]
=12.75÷[14.6-9.5]
=12.75÷5.1
=2.5;
(14)3.2+3.91÷(19-16.7)
=3.2+3.91÷2.3
=3.2+1.7
=4.9.
=4.5×(5.2+4.8)
=4.5×10
=45;
(2)8.8×1.25
=(8+0.8)×1.25
=8×1.25+0.8×1.25
=10+1
=11;
(3)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(4)60.8-1.75-1.25
=60.8-(1.75+1.25)
=60.8-3
=57.8;
(5)0.4×(4.3×2.5)
=4.3×(0.4×2.5)
=4.3×1
=4.3;
(6)45×10.1
=45×(10+0.1)
=45×10+45×0.1
=450+4.5
=454.5;
(7)0.63+0.42+0.37+9.58
=(0.63+0.37)+(0.42+9.58)
=1+10
=11;
(8)8.36×99+8.36
=8.36×(99+1)
=8.36×100
=836;
(9)0.78×99
=0.78×(100-1)
=0.78×100-0.78×1
=78-0.78
=77.22;
(10)90÷(3.6-1.8)
=90÷1.8
=50;
(11)36÷[(6.1-4.6)×0.8]
=36÷[1.5×0.8]
=36÷1.2
=30;
(12)1.6×(2.25+10.5÷1.5)
=1.6×(2.25+7)
=1.6×9.25
=14.8;
(13)12.75÷[14.6-(1.3+8.2)]
=12.75÷[14.6-9.5]
=12.75÷5.1
=2.5;
(14)3.2+3.91÷(19-16.7)
=3.2+3.91÷2.3
=3.2+1.7
=4.9.
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