Integers

Addition

100

(+5)+(+6)

=+11

200

(+15)+(15)

(+30)

300

(+24)+(+36)

(+50)

400

(+123)+(+72)

(+1950

500

(+234)+(+77)

(+301)

Subtraction

100

(+2)-(-10)

(+12)

200

(+23)-(-12)

(+35)

300

(-23)-(-13)

= -10

400

(78)-(64)

= 14

500

(+237)-(-192)

= +329

Both

100

(-13)+(+12)

= -1

200

(34)+(-27)

= 7

300

(-57)-(-49)

= -8

400

(+83)+(-37)

= 120

500

(890)-(723)-(12)

= 155

Addition difficult

100

(274)+(7895)

= 8169

200

(236)+(892)

= 1128

300

(239)+(877)

+ 1116

400

(890)(7876)

= 8766

500

(189)+(123)+(147)+(89765)+(7865)

= 98089

Subtraction very difficult

100

(-300)-(-233)

(-77)

200

(-678)-(-568)

(-108)

300

(333)-(-247)

= 83

400

(233)-(22)-(209)

= 9

500

(-10010)-(10)-(-550)-(-9550)

0