1)2又6分之5+2.25-1又2分之1 (2)4又9分之5-1.33+1又9分之4-3.07
3)15分之8÷0.32X12分之11(4)4分之3X(2.5-4分之1)+12分之5÷0.25...
3)15分之8÷0.32X12分之11 (4)4分之3X(2.5-4分之1)+12分之5÷0.25
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(1)2又6分之5+2.25-1又2分之1
=2又6分之5+(2.25-1又2分之1
)
=2又5/6-3/4
=2又1/121
(2)4又9分之5-1.33+1又9分之4-3.07
=(4又9分之5+1又9分之4)-(1.33+3.07)
=6-4.4
=1.6
(3)15分之8÷0.32X12分之11
=8/15×25/8×11/12
=5/3×11/12
=55/36
(4)4分之3X(2.5-4分之1)+12分之5÷0.25
=3/4×9/4+5/3
=27/16+5/3
=3又17/48
=2又6分之5+(2.25-1又2分之1
)
=2又5/6-3/4
=2又1/121
(2)4又9分之5-1.33+1又9分之4-3.07
=(4又9分之5+1又9分之4)-(1.33+3.07)
=6-4.4
=1.6
(3)15分之8÷0.32X12分之11
=8/15×25/8×11/12
=5/3×11/12
=55/36
(4)4分之3X(2.5-4分之1)+12分之5÷0.25
=3/4×9/4+5/3
=27/16+5/3
=3又17/48
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(1)2又6分之5+2.25-1又2分之1
=2又6分之5+(2.25-1又2分之1
)
=2又5/6-3/4
=2又1/121
(2)4又9分之5-1.33+1又9分之4-3.07
=(4又9分之5+1又9分之4)-(1.33+3.07)
=6-4.4
=1.6
(3)15分之8÷0.32X12分之11
=8/15×25/8×11/12
=5/3×11/12
=55/36
(4)4分之3X(2.5-4分之1)+12分之5÷0.25
=3/4×9/4+5/3
=27/16+5/3
=3又17/48
=2又6分之5+(2.25-1又2分之1
)
=2又5/6-3/4
=2又1/121
(2)4又9分之5-1.33+1又9分之4-3.07
=(4又9分之5+1又9分之4)-(1.33+3.07)
=6-4.4
=1.6
(3)15分之8÷0.32X12分之11
=8/15×25/8×11/12
=5/3×11/12
=55/36
(4)4分之3X(2.5-4分之1)+12分之5÷0.25
=3/4×9/4+5/3
=27/16+5/3
=3又17/48
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