Matematica e...

CALCOLO VELOCE
Fai attenzione al segno e aggiungi o sottrai...
DECINE
324 + 30 = ___________ 354
5 699 – 50 = ___________ 5 649
7 307 + 80 = ___________ 7 387
1 510 + 60 = ___________ 1 570
3 470 – 70 = ___________ 3 400
Calcola in riga.
342 + 31 = _____________ 373
1 500 + 84 = ___________ 1 584
30 + 29 + 3 = __________ 62
2 300 + 50 + 14 = ______ 2 364
CENTINAIA
4 531 – 400 = ___________ 4 131
2 483 – 500 = ___________ 1 983
1 642 + 300 = ___________ 1 942
728 – 700 = ___________ 28
8 034 + 900 = ___________ 8 934
73 – 21 = _________ 52
96 – 36 = _________ 60
842 – 41 = ________ 801
783 – 183 = _______ 600
Moltiplica e dividi velocemente per 10, 100, 1 000.
32 x 10 = ________________
320
54 x 100 = _______________
5 400
759 x 10 = _______________
7 590
4 x 1 000 = ______________
4 000
70 : 10 = ___________ 7
350 : 10 = __________ 35
400 : 100 = _________ 4
8 000 : 1 000 = ______ 8
45 x 100 = _______________
4 500
90 x 10 = ________________
900
7 x 1 000 = ______________
7 000
10 x 10 = ________________
100
870 : 10 = __________ 87
6 300 : 100 = _______ 63
5 000 : 1 000 = ______ 5
7 320 : 10 = _________ 732
12 x 3 = _______ 36
43 x 2 = _______ 86
30 x 5 = _______ 150
21 x 4 = _______ 84
MIGLIAIA
6 237 + 2 000 = ___________ 8 237
9 824 – 5 000 = ___________ 4 824
350 + 4 000 = ___________ 4 350
38 + 1 000 = ______________ 1 038
5 720 – 3 000 = ___________ 2 720
48 : 2 = _____ 24
55 : 5 = _____ 11
39 : 3 = _____ 13
400 : 4 = ____ 100
900 x 10 = _______________
9 000
3 x 100 = ________________
300
50 x 100 = _______________
5 000
6 x 1 000 = ______________
6 000
600 : 10 = __________ 60
8 200 : 100 = _______ 82
2 000 : 1 000 = ______ 2
1 530 : 10 = _________ 153
8 NUMERI