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Calcola il valore delle seguenti espressioni,scrivendo tutti i passaggi.
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Mettiti alla prova
a. 5 + 15 – 6 + 4 + 3 – 11. [10]
b. 23–(19–7+8)+(20+5–11+9). [26]
c. 30–8+[(9+13–4)–18+2]–15. [9]
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Risolvi le seguenti espressioni con addizioni e sottrazioniLoading...
a) 25 – (8 + 5) + 3 – (6 + 4)
b) 19 – 7 + 2 – (27 – 5 - 12) + 18 – (5 + 5 + 9)
c) 15 - [60 – (7 + 9 + 34)] - 5
d) 37 - [13 + (2 + 8) + (21 - 9)]
e) 10 - 2 – [(15 + 12 - 17) – (26 + 10 + 5 - 33)]
f) 35 - 10 + 5 - [35 - (5+ 10 - 5)] - 1
g) 32−{[(18–4−6)+(11–5−4)−9]+15}−10
h) 21−{27−[10−(21+4−18)+15]+(13–7−5)}−9
i) 21+28−(6+12)−{24+[20+16−(12–6−2)]–42+10}
l) 1−{17+[13−(26−18+5)]−17}−1−[8+9−(10+6−3)]
m) 25−{[24−(23−21+10)]−(10−5)}−9
ESEMPIO 1
16:2+5×3–4+15:5×6=
=8 + 15 – 4 + 18= 37
16:2+5×3–4+15:5×6=
=8 + 15 – 4 + 18= 37
ESEMPIO 2
2 + {[12 : (3+3)] × 8–14} × 4=
= 2 + {[12 : 6] × 8 – 14} × 4 =
= 2 + {2 × 8 – 14} × 4 =
= 2 + {16 – 14} × 4 =
= 2+2×4=
=2+8=
=10
2 + {[12 : (3+3)] × 8–14} × 4=
= 2 + {[12 : 6] × 8 – 14} × 4 =
= 2 + {2 × 8 – 14} × 4 =
= 2 + {16 – 14} × 4 =
= 2+2×4=
=2+8=
=10
1) 6 × 8 – 3 × 4 + 2 – 7 × 5. [3]
2) 7 × 10 – (6 × 5 + 7 × 4 ) – 4 × 2 [4]
3) 16 : 8 + 5 × 2 – 1 + 20 : 4 × 5 – 3 × 8 [12]
4) 30 : 10 + (7 × 5 + 9 : 3) – 4 : 2 × 9 + 7 [30]
1) 6 ∶ 2 + 8 · 4 − (3 + 2 + 1) · 5 ∶ 15
2) (10 + 1 + 5) ∶ 8 + (8 ∙ 10 + 40) ∶ 60
3) (34 ∶ 2 + 3 · 3– 5 · 2 · 2) ∶ 6 − 1
4) 7+4+3–(8+2)+(11+6):17
5) (28 ∶ 7 + 1 − 4) · 10 + (5 · 8 − 40 ∶ 2) − 15
6) (2 + 5 · 5) · 2 – 18 · 3
7) 15 − {[27 − (50 − 32)] · 5} ∶ 3 + 2
8) 1 − [(3 + 2 · 20 – 4 · 3) – (5 + 9 ∶ 9) · 4] ∶ 7
9) (3 · 2 – 5 · 0 + 3 · 3 – 17 ∶ 17) · 2 − 24 ∶ 2
10) (2 + 3 + 4 + 5) ∶ 7 + (26 ∶ 2 + 4 · 2) ∶ 21
11) [5+18:(11×3–6×5)]:11 [1]
2) (10 + 1 + 5) ∶ 8 + (8 ∙ 10 + 40) ∶ 60
3) (34 ∶ 2 + 3 · 3– 5 · 2 · 2) ∶ 6 − 1
4) 7+4+3–(8+2)+(11+6):17
5) (28 ∶ 7 + 1 − 4) · 10 + (5 · 8 − 40 ∶ 2) − 15
6) (2 + 5 · 5) · 2 – 18 · 3
7) 15 − {[27 − (50 − 32)] · 5} ∶ 3 + 2
8) 1 − [(3 + 2 · 20 – 4 · 3) – (5 + 9 ∶ 9) · 4] ∶ 7
9) (3 · 2 – 5 · 0 + 3 · 3 – 17 ∶ 17) · 2 − 24 ∶ 2
10) (2 + 3 + 4 + 5) ∶ 7 + (26 ∶ 2 + 4 · 2) ∶ 21
11) [5+18:(11×3–6×5)]:11 [1]
E i problemi?
