Toán Lớp 6: Thực hiện phép tính :
a) 47. 134 – 47.35 + 47
c) -(-2021 + 2789) + (1789 – 2021)
b) 2028 – {[39 – (2³.3 – 21)²] : 3 + 2021mũ 0}
d ) 345 – 150 : [(33 – 24)2 – (– 21)] + 2021mũ 0
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Toán Lớp 6: Thực hiện phép tính :
a) 47. 134 – 47.35 + 47
c) -(-2021 + 2789) + (1789 – 2021)
b) 2028 – {[39 – (2³.3 – 21)²] : 3 + 2021mũ 0}
d ) 345 – 150 : [(33 – 24)2 – (– 21)] + 2021mũ 0
Comments ( 1 )
= 47.134 -47 .35 + 47 .1
= 47 . ( 134 – 35 + 1 )
= 47 . 100
= 4 700
c) ( 2021 + 2789 ) + ( 1789 – 2021 )
= 2021 + ( 2789 – 1789 )
= 2021 + 1 000
= 3 021
b) 2028 – {[39 – ( 2³ .3 – 21)² ] : 3 + 2021 mũ 0 }
= 2028 – {[39 – (8 . 3 – 21 )² ] : 3 + 1 }
= 2028 – {[39 – ( 24 – 21 )² ] : 3 + 1 }
= 2028 – {[39 – 3² ] : 3 + 1 }
= 2028 – {[39 – 9 ] : 3 + 1 }
= 2028 – { 30 : 3 + 1 }
= 2028 – 11
= 2017
d) 345 -150 : [( 33 – 24 )² – ( 21 )] + 2021 mũ 0
= 345 -150 : [( 33 – 24 )² – ( 21 )] + 1
= 345 -150 : [ 9² – 21 ] + 1
= 345 -150 : [ 81 – 21 ] + 1
= 345 -150 : 60 + 1
= 345 – 2,5 + 1
= 342,5 + 1
= 343,5
Lời giải và giải thích chi tiết:
Cho mk xin CTLHN ạ ????????