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FISA DE LUCRU

1) Calculati:

7 x ( 6 + 3 ) = (4 +2) x 6= ( 8 x 2 ) + ( 9 x 2) = 3 x1 ! 2 x 9 = 9 x (2 +4 ) = (" + 3 ) x 9= ( 7 x 8 ) ! ( 6 x 9) = 219#6x3= 3 x ( 3 ! 3 ) = (2 +8 ) x 2= ( 6 x 7 ) # ( 6 x 4 ) = 4#4:8=

2) A$lati %u&a'ul %cu%*cut:

6 x a = 24 a x 8 = 64 a#327=428 27: % = 9 a + 2647 = "728 7 x a = "6 3 x a = 27 24: a=6 % !37=42 ! 3"42 = "278 a x 9 = 63 a+237=7 27+%=8 8 x % = "6 a : 8 = 3

3) E$ctuati:

7 x 8= 8x 6= 9x 4= 9 x 9= " x 2 x 4= 9x4= 6 x 9 = 8 x 8= 7 x "= 8 x 9= 4 x 2 x 8 = 3x"= 2 x 4= 7 x 9= 2 x 2= 7 x 6= 3 x 3 x 6 = 8x4= 3 x "= 4 x 4= 8 x 4= 8 x 8= " x 2 x 6 = 6x8= 6 x 4= 3 x 7= 6 x 4= 6 x 9= 3 x 2 x 7 = 6x6=

4) Calculati :

a) , 7 'i %u&'l: "-6- 3-2-9-1) cu 7 %u&'l: "-6- 3-2-9-1c) , 3 'i *u&a %u&'l': 2 .i 6- 3 .i 3- 7 .i 3,) cu 3 *u&a %u&'l': 2 .i 6- 3 .i 3- 7 .i 3) , c/t 'i *t &ai &a' 4" ,c/t 90 63 ,c/t 70 28 ,c/t 4$) cu c/t *t &ai &a' 7" ,c/t ""0 "" ,c/t 270 6 ,c/t 32) , c/t 'i *t &ai &ic 2 ,c/t 180 7 ,c/t 210 " ,c/t 3") cu c/t *t &ai &ic 1" ,c/t 490 6" ,c/t 90 44 ,c/t 1i) ,i% *u&a %u&'l' 4688 .i 3"9 *ca, ,i$'%a %u&'l' 9872 .i 87

") u%i *&%ul 5- *au =6 x 6 9 x 4 " x 98 x 87 x " 3 x " 7 x 79 x 99 x 86 x 8 3 x 69 x 27 x 63 x 9 6 x 43 x "

6) Calculati :

693#"1= 4"+37= "2+43= 2+2: 2= 81#79= 77+19= 36+14= 81: 9x7#4x9:6= 838#1= 6"+16= 87#19= 1#( 36+4x7)= 7#"= 88+ 9= 7x8#32:4=

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7) 2 341 + " 367+ 3 89+ 6 2"1+ 7 849 # 8 673 # 6 421 # 3 1"6 1 278 3 977 1 969 3 416 2 4"4 1 288

8) La li''i *#au 'i&it 4" c'i cu ;.ti .i cu 16 &ai ui% c'i cu 9) U% ',i%a' a' % *' 9 , $l'i Di% ac*ta 124" *u%t a'a$- lall cu " &ai&ult- ia' '*tul *u%t t'a%,a$i'i C/i t'a%,a$i'i *u%t>

1) ?%t'# ucat , /%

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1") C ''