Toán Lớp 6: b) 394. 1768 + 606. 1769 + 394
c) 1876. 31 + 56. 124 + 25. 1876 d) 2021. 7615 + 2022. 2385 – 1355
e) ( 565656. 79 – 797979. 56 ) 1.2 + 2.3 + 3.4 + … + 99.100)
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Toán Lớp 6: b) 394. 1768 + 606. 1769 + 394
c) 1876. 31 + 56. 124 + 25. 1876 d) 2021. 7615 + 2022. 2385 – 1355
e) ( 565656. 79 – 797979. 56 ) 1.2 + 2.3 + 3.4 + … + 99.100)
Comments ( 2 )
= 1768 .( 394+ 606)=394
= 1768.1000+394
= 1769000+394
=1769394
c)1876. 31 + 56. 124 + 25. 1876
=(1876. 31 + 25. 1876)+ 56. 124
=1876. 56+56.124
=56.(1876+124)
=56.2000
=112000
d) 2021. 7615 + 2022. 2385 – 1355
=