Question

tính nhanh 

Answer 1

h, 48.19 + 48.115 + 134.52

= 48.(19 + 115) + 134.52

= 48.134 + 134.52

= 134.( 48 + 52 )

= 134.100

= 13400

i, 27.121 - 87.27 + 73.34

= 27.(121 - 87 ) + 73.34

= 27.34 + 73.34

= 34.( 27 + 73 )

= 34.100

= 3400

j, 125.98 - 125.46 - 52.25

= 125.( 98 - 46 ) - 52.25

= 125.52 - 52.25

= 52.(125-25)

= 52 . 100

= 5200.

Answer 2

h, 48.19 + 48.115 + 134.52

= 48.(19 + 115) + 134.52

= 48.134 + 134.52

= 134.( 48 + 52 )

= 134.100

= 13400

i, 27.121 - 87.27 + 73.34

= 27.(121 - 87 ) + 73.34

= 27.34 + 73.34

= 34.( 27 + 73 )

= 34.100

= 3400

j, 125.98 - 125.46 - 52.25

= 125.( 98 - 46 ) - 52.25

= 125.52 - 52.25

= 52.(125-25)

= 52 . 100

= 5200.

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