(1) calcule as multiplicações com números inteiros

(a) (+6).(-3)=
(b) (+19).(-9)=
(c) (+25).(+5)=
(d) (+12).(+9)=
(e) (-6).(+8)=
(f) (-15).(+4)=
(g) (-52).(-9)=
(h) (-61).(-3)=
(i) (-154).(+2)=
(j) (+212).(-3)=
(k) (+36).(+6)=
(l) (+125).(-5)=
(m) (+36).(+10)=
(n) (+81).(-13)=
(o) (+62).(+10)=
(p) (-12).(-12)=
(q) (-30).(15)=
(r) (+69).(+11)=
(s) (+16).(-22)=
(t) (-73).(+25)=
(u) (+100).(-12)=
(v) (+61).(+14)=
(w) (-12).(-12)=
(x) (-61).(+16)=
(y) (+15).(+11)=
(z) (-99).(-9)=
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